908 Devices Inc.

Historical 13F Holders

Symbol
MASS
CUSIP
65443P102
All holders as of
Q2 2026
Type
Equity
Class
COM
Reported Value, Excluding Options
Total Filings

13D/G Filers

Investors who own more than 5% of a class must file a Schedule 13D or 13G. Every filing for 65443P102 since 12/18/2024, newest first.

Filer % of Class Filed
AWM Investment Company, Inc. 13G/A Amendment 1 11.8% 8/14/2026
Event 6/30/2026
ARK Investment Management LLC 13G/A Amendment 9
5.3% 8/14/2026
Event 6/30/2026
ARCH Venture Fund VII, L.P. 13G/A Amendment 6
14.1% 8/14/2026
Event 6/30/2026
BlackRock, Inc. 13G 5.1% 7/27/2026
Event 6/30/2026
ARK Investment Management LLC 13G/A Amendment 8
4.9% 6/5/2026
Event 5/31/2026
ARCH Venture Fund VII, L.P. 13G/A Amendment 5
15.3% 5/15/2026
Event 3/31/2026
First Light Asset Management, LLC 13G/A Amendment 2
17.1% 2/17/2026
Event 12/31/2025
State Street Corp 13G
1.6% 2/9/2026
Event 12/31/2025
First Light Asset Management, LLC 13G/A Amendment 1
12.9% 12/5/2025
Event 11/30/2025
First Light Asset Management, LLC 13G
9.8% 11/14/2025
Event 9/30/2025
ARK Investment Management LLC 13G/A Amendment 7
5.4% 11/4/2025
Event 9/30/2025
State Street Corp 13G
6.4% 8/11/2025
Event 6/30/2025
Ameriprise Financial, Inc. 13G/A Amendment 1
0% 5/15/2025
Event 3/31/2025
BlackRock, Inc. 13G/A Amendment 1 4.6% 4/25/2025
Event 3/31/2025
AWM Investment Company, Inc. 13G 14.7% 4/7/2025
Event 3/31/2025
ARK Investment Management LLC 13G/A Amendment 6 8.0% 2/14/2025
Event 12/31/2024
Vanguard Group Inc 13G/A Amendment 1 3.8% 1/30/2025
Event 12/31/2024
ARK Investment Management LLC 13G/A Amendment 5 9.3% 1/10/2025
Event 9/30/2024

13F Holders by Quarter

Period Filings Shares, Excl. Options Value, Excl. Options
2026 Q3 3 2.54 k $31.3 k
2026 Q2 114 29.0 M $253 M
2026 Q1 113 27.9 M $171 M
2025 Q4 121 26.2 M $137 M
2025 Q3 110 24.5 M $215 M
2025 Q2 107 24.7 M $176 M
2025 Q1 93 20.6 M $92.3 M
2024 Q4 86 16.8 M $36.9 M
2024 Q3 90 18.6 M $64.8 M
2024 Q2 98 19.6 M $101 M
2024 Q1 83 20.8 M $157 M
2023 Q4 87 22.1 M $248 M
2023 Q3 86 21.1 M $141 M
2023 Q2 90 21.3 M $146 M
2023 Q1 88 21.9 M $188 M
2022 Q4 99 22.5 M $171 M
2022 Q3 85 22.0 M $360 M
2022 Q2 81 20.6 M $397 M
2022 Q1 89 20.2 M $384 M
2021 Q4 94 19.0 M $491 M
2021 Q3 93 16.1 M $522 M
2021 Q2 75 11.7 M $452 M
2021 Q1 73 8.55 M $414 M
2020 Q4 72 8.06 M $458 M